So I have created the attached Wien bridge oscillator using a transistor differential amplifier, the Negative gain is controlled using a potentiometer, center tapped and yes I understand that in the real world I would need to use an AGC to stabilise the output.

My problem is that the calculated frquency given the component should be,

f = 1/2picr = 1 / 23.14110nF*5koHM = 3.18Hz, But as you can see on the image, I'm getting something in the tune of +-863.04,

I have searched everywhere and I don't know what i'm doing wrong here,

So I have created the attached Wien bridge oscillator using a transistor differential amplifier, the Negative gain is controlled using a potentiometer, center tapped and yes I understand that in the real world I would need to use an AGC to stabilise the output.

My problem is that the calculated frquency given the component should be,

f = 1/2picr = 1 / 23.14110nF*5koHM = +-318.369Hz, But as you can see on the image, I'm getting something in the tune of +-863.04,

I have searched everywhere and I don't know what i'm doing wrong here,